某白钨多金属矿浮选尾矿中萤石提取技术研究

为了缓解萤石资源严峻形势,提高低品位难选萤石矿以及共（伴）生型萤石矿的综合利用水平,结合矿石性质分析基础上,进行了系列条件试验研究、部分流程开路试验研究以及全流程闭路试验研究,研究结果表明：在一次粗选二次扫选,粗精矿再磨后进行五次精选,中矿顺序返回的原则流程条件下,以油酸为捕收剂、水玻璃和腐植酸钠为组合抑制剂、碳酸钠为pH调整剂,可实现该白钨多金属矿尾矿中萤石二次资源的有效回收利用;当捕收剂油酸用量450 g／t,组合抑制剂2．8 kg／t,碳酸钠1 kg／t时,在给矿CaF2品位16．41％的条件下,获得了CaF2品位为87．92％、CaF2回收率为53．53％的萤石精矿。     

某方解石型萤石矿可选性试验研究

文章介绍了某萤石矿的工艺矿物学性质及可选性试验研究。根据试样的矿石性质,确定采用优先脱硫,一粗一扫粗精矿再磨九次精选的工艺流程,获得了CaF2品位为97.06%,SiO2质量分数为0.84%,CaCO3质量分数为1.09%的萤石精矿产品。     

浮钨尾矿萤石的活化与浮选分离

针对我国某地浮钨尾矿中萤石被强烈抑制的特点,对萤石纯矿物及实际矿进行了浮选试验研究,开发出能有效恢复萤石可浮性的新型活化剂ANF-1,通过“一粗七精”的浮选流程,从含CaF224.93％的浮钨尾矿回收萤石,可获得含CaF2 95.03％的萤石精矿,CaF2回收率达62.13％.     

萤石与重晶石浮选分离试验研究

贵州某萤石矿中萤石与重晶石含量高,由于矿物可浮性相近,分离难度较大.本文提出合理的工艺流程及参数,通过几种抑制剂的组合和配制,可使可浮性相近的萤石、重晶石实现有效分离,在开路精选四次试验条件下可得到品位91.89%、回收率74.22%的CaF2精矿.     

永丰萤石矿粗精矿再磨浮选新工艺研究

本文研究了萤石—石英矿石的浮选，通过试验提出了粗精矿再磨浮选新工艺，各项指标较原工艺均有较大提高。     

某高硫细粒萤石矿浮选试验研究

针对共生密切、粒度细、含杂高萤石矿的回收技术难题,对某萤石矿进行了大量的试验研究。浮选条件试验结果表明,在磨矿细度为-0.074mm占85%,碳酸钠用量为2kg/t,T31用量为1.5kg/t,油酸用量为300g/t,粗精矿再磨细度为-0.038mm占94%时,萤石回收指标最好。并在此基础上进行了闭路试验,最终得到品位为97.17%,回收率为87.13%的萤石精矿,获得了较好的浮选指标。     

武陵山区典型萤石矿选矿试验研究

以武陵山区典型萤石矿为研究对象,采用在碱性环境中混合浮选去除方解石和石英、在酸性环境中分离萤石与重晶石的工艺流程,试样经1粗7精1扫获得CaF2质量分数为97.80%、CaF2回收率为81.98%的萤石精矿,达到了YB/T5217-2005萤石精矿FC-97A质量标准;同时回收得到BaSO4质量分数为93.84%、BaSO4回收率为87.05%的重晶石精矿,达到了化工用优-2质量标准,实现了萤石、重晶石、方解石、石英的有效分离,为武陵山区典型萤石矿的综合利用提供了参考。     

磨矿介质对中低品位磷矿石浮选的影响

针对贵州织金中低品位磷矿石,采用钢球和钢棒为磨矿介质及“一粗一精”的反浮选工艺流程进行了浮选富集磷的试验,结果表明:在磨矿细度-0.074 mm为75.00％时,采用棒磨方式,获得的磷精矿含P2O5 33.45％,MgO1.28％,精矿中P2O5回收率为89.26％.     

湖南某石英型萤石矿选矿试验研究

根据湖南某石英型萤石矿的矿石性质,选用碳酸钠为pH调整剂,水玻璃+糊精为组合抑制剂,油酸为捕收剂进行浮选试验研究,闭路流程粗选磨矿细度为-200目占42.52%,采用1次磨矿粗选—粗精矿再磨—7次精选—中矿顺序返回的工艺流程,可以获得品位96.45%、回收率79.71%的萤石精矿。     

云南某萤石与重晶石共生矿选矿工艺

针对萤石重晶石共生矿可浮性相近、浮选分离困难的选矿难题,对云南某萤石重晶石共生矿进行了选矿工艺研究. 结果表明,原矿含重晶石44.38%,萤石20.21%,脉石矿物主要为石英. 经多个实验流程对比后,最终采用萤石和重晶石混合浮选流程,以皂化油酸钠为捕收剂. 采用抑重浮萤的流程,以硫酸铝为重晶石抑制剂,保证萤石可浮性. 经闭路分选流程得到品位96.13%、回收率88.74%的萤石精矿和品位87.65%、回收率97.78%的重晶石精矿.     

一种低品位萤石矿的选矿工艺研究

本文以德化县金竹坑低品位萤石矿的矿石为例,原矿经破碎后,通过粗选磨矿细度试验确定磨矿细度,正交法确定药剂用量,经开路试验探索后,采用一次粗选、七次精选闭路浮选的小型闭路流程进行选矿试验,选别后获得的最终产品指标为:萤石精矿产率19.86%、萤石精矿品位96.27%、萤石回收率92.44%。     

某低品位矾矿选矿试验研究

浙江某低品位矾矿矿石性质复杂,嵌布粒度细,采用一次粗选三次精选两次扫选中矿依次返回的碱法浮选流程进行浮选试验,再将浮选得到的明矾石精矿经高梯度强磁选除铁,最终获得的明矾石精矿含Fe2O31.71％,SO3品位28.78％,SO3回收率82.23％.产品质量超过了明矾石特级品要求.     

Study on flotation performances and adsorption mechanism of 2-carboxyethylphenylphosphinic acid to cassiterite

A novel collector, 2-carboxyethylphenylphosphinic acid (CEPPA), was first used in the flotation of cassiterite. The flotation performances and the adsorption mechanism of CEPPA on cassiterite were investigated by flotation tests, adsorption experiments, zeta potential measurements, Fourier-transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS) analyses. The results indicated that CEPPA had strong collecting power for cassiterite and fluorite over a wide pH range but little on quartz. In the separation of the cassiterite–quartz mixture, a concentrate containing 90.9% SnO₂ was obtained with a recovery of 95.7% at pH 7.0. The cassiterite in the cassiterite–fluorite mixture could be effectively separated using 300 mg/L sodium silicate in conjunction with 60 mg/L CEPPA, and a concentrate with a grade of 90.3% SnO₂ and a recovery of 92.6% was achieved at neutral pH. Zeta potential analysis demonstrated that the adsorption process involved both physical and specific forces. The results of FTIR and XPS further suggested that the four O atoms of CEPPA reacted with the Sn atoms on cassiterite surface, forming a complex which was similar to the Sn–CEPPA precipitate, and hydrogen bonding adsorption could have taken place between the terminal hydroxyl groups and CEPPA anions.     

大柴旦低品位硼矿富集研究

研究了一种提高青海大柴旦地区低品位硼矿品位的浮选方法。采用Y-ZS为调整剂、B-HW为捕收剂,经两次粗选、两次精选、一次扫选流程,可获得较好的浮选分离指标,可使硼矿B2O3品位由7.36%提高到17.21%,收率达到77.25%。     

A Study on the Utilization of Ultrasonic Pretreatment in Zinc Flotation

This paper deals with the investigation of the effect of ultrasonic pretreatment on the mechanical flotation of zinc from lead-zinc-copper ore. After the chosen flotation parameters such as KAX dosage, frother amount, flotation time, stirring rate and amount of Na₂SiO₃, were optimized by flotation experiments without ultrasonic pretreatment, flotation experiments with ultrasonic pretreatment were carried out under these optimized conditions. The results obtained by both methods were compared. A zinc concentrate containing 8.52% Zn was obtained from feed containing 1.60%Zn with 24.64% recovery using mechanical flotation method without ultrasonic pretreatment. On the other hand, a concentrate containing 18.73%Zn was obtained with 33.18% recovery using flotation with ultrasonic pretreatment. It has been concluded that, ultrasonic pretreatment improved the grade and recoveries in zinc flotation due to the energy released by cavitation bubbles generated in the ultrasonic cleaning bath. XRD analysis were also supported the positive effect of ultrasonic pretreatment on flotation.     

浏阳磷矿西井田深部磷块岩正─反浮选试验

浏阳磷矿为含高铁铝的沉积轻变质磷块岩矿床，选矿难度较大。采用湖南化工研究院研制的新型捕收剂ＰＳ－３０，正确选择正─反浮选方案，正浮选不加碱除铁铝，初步富集磷矿石；反浮选抑制磷矿物浮选碳酸盐，从而使磷精矿Ｐ２Ｏ５达到３０．３４％，回收率７５．２７％，产品质量达到酸法加工磷肥用磷矿三类品标准。     

非洲某大鳞片石墨矿选择性磨浮试验研究

对坦桑尼亚某大鳞片石墨矿进行选择性磨浮试验研究,在确定最佳粗选条件和粗精矿再磨细度的基础上,对比传统选矿工艺流程和优化工艺流程,采用新的优化工艺流程达到了保护石墨大鳞片又提高石墨精矿品位和回收率的目的,最终获得固定碳含量为96．28％,回收率为90．69％的石墨精矿,相比传统工艺流程分别提高了9．63％和3．4％。